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Difference between revisions of "ASLR"
m (→dyld_shared_cache: presumably a formatting typo) |
m (fix typo) |
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==dyld_shared_cache== |
==dyld_shared_cache== |
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*The system libraries are now stored in a big cache file, see [http://www.iphonedevwiki.net/index.php/Dyld_shared_cache] |
*The system libraries are now stored in a big cache file, see [http://www.iphonedevwiki.net/index.php/Dyld_shared_cache] |
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| − | *This |
+ | *This address randomized at boot time, in many possible places, higher in the address space than the program |
*The functions retain a fixed offset to each other. |
*The functions retain a fixed offset to each other. |
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Revision as of 22:05, 18 January 2012
Address Space Layout Randomization
First added
- with iOS 4.3
Program and dyld
- On program load, the address space offset of the program is randomized between 0x0 and 0x100000
- It always falls on a 0x1000 page boundary
- dyld is included in this sliding section
- The system libraries are now stored in a big cache file, see [1]
- This address randomized at boot time, in many possible places, higher in the address space than the program
- The functions retain a fixed offset to each other.
